Calibration of insulin pens by an adjunct device

Abstract

In some embodiments, an adjunct device for tracks time and/or dosage of a medicine. The device may include a connector for mounting the device to a deposable pen injector. The device may be configured to allow use of the native controls and injectors of the injector. For example the device may include a view port for viewing a dose indicator of the injector. The device may include one or more vibration sensors. A processor may be configured to differentiate increasing a dose, decreasing a dose and/or discharging the medicine based on the output of the sensors. Optionally a display of the device may be positioned for simultaneous viewing with the dosage indicator of the injector. For example a user may verify the accuracy of the adjunct device before performing a discharge.

What is claimed is: 
     
         1 . A method for calibrating a dosage tracking device releasably connected to a pen injector, comprising:
 sensing a delivered dosage from the pen injector;   reading a selected dosage from the dosage tracking device while releasably connected to the pen injector; and   comparing the delivered dosage from the injector and the selected dosage from the dosage tracking device, and if there is not agreement between the delivered dosage from the injector and the selected dosage from the dosage tracking device, then adjusting dosage output of the dosage tracking device according to the delivered dosage from the injector.   
     
     
         2 . The method of  claim 1 , further comprising comprising wirelessly transmitting the delivered dosage and the selected dosage from the dosage tracking device to a mobile phone 
     
     
         3 . The method of  claim 1 , further comprising sensing a releasable connection of the dosage tracking device to a first pen injector and sensing a releasable connection of the dosage tracking device to a second pen injector. 
     
     
         4 . The method of  claim 3 , wherein the dosage tracking device includes a quick release mechanism for releasably connecting the dosage tracking device to the first pen injector and for releasably connecting the dosage tracking device to the second pen injector. 
     
     
         5 . The method of  claim 1 , further comprising:
 measuring circumferential acceleration of the pen injector when the dosage tracking device is releasably connected to the pen injector using a sensor included in the dosage tracking device;   distinguishing a click of a dosage adjuster included in the pen injector; and\   adjusting dosage output of the dosage tracking device according to the measuring circumferential acceleration and the click of a dosage adjuster.   
     
     
         6 . The method of  claim 1 , further comprising zeroing the injection dosage of the pen injector and zeroing a dosage counter of the dosage tracking device. 
     
     
         7 . A method for calibrating a dosage tracking device releasably connected to one pen injector of multiple pen injectors, comprising:
 releasably connecting the dosage tracking device to a first pen injector;   sensing a first delivered dosage from the first pen injector;   reading a first selected dosage from the dosage tracking device while the dosage tracking device is releasably connected to the first pen injector;   comparing the first delivered dosage from the injector and the first selected dosage from the dosage tracking device, and if there is not agreement between the first delivered dosage from the first pen injector and the first selected dosage from the dosage tracking device, then adjusting dosage output of the dosage tracking device according to the first delivered dosage from the injector.   releasably connecting the dosage tracking device to a second pen injector;   sensing a second delivered dosage from the second pen injector;   reading a second selected dosage from the dosage tracking device while the dosage tracking device is releasably connected to the second pen injector; and   comparing the second delivered dosage from the injector and the second selected dosage from the dosage tracking device, and if there is not agreement between the second delivered dosage from the second pen injector and the second selected dosage from the dosage tracking device, then adjusting dosage output of the dosage tracking device according to the second delivered dosage from the second pen injector.   
     
     
         8 . The method of  claim 7 , further comprising comprising wirelessly transmitting the first delivered dosage and the first selected dosage from the dosage tracking device to a mobile phone, and providing an instruction using the mobile phone to adjust the dosage output of the dosage tracking device. 
     
     
         9 . The method of  claim 7 , further comprising sensing releasable connection of the dosage tracking device to the first pen injector and sensing releasable connection of the dosage tracking device to the second pen injector using the same sensor used to detect the first delivered dosage and to detect the second delivered dosage. 
     
     
         10 . The method of  claim 7 , wherein the dosage tracking device includes a quick release mechanism for releasably connecting the dosage tracking device to the first pen injector and for releasably connecting the dosage tracking device to the second pen injector. 
     
     
         11 . The method of  claim 7 , further comprising precalibrating the dosage tracking device to the first pen injector using a sensor and a processor configured to recognize the first pen. 
     
     
         12 . The method of  claim 11 , wherein the sensor is a vibration sensor and a processor is configured to distinguish a characteristic sound of the first pen. 
     
     
         13 . A method for calibrating a dosage tracking device releasably connected to a pen injector, the method comprising:
 measuring a delivered dosage from the pen injector using one or more sensors on the dosage tracking device while the dosage tracking device releasably connected to the pen injector;   reading a desired dosage using at least one sensor on the dosage tracking device releasably connected to the pen injector;   comparing the delivered dosage from the injector and the desired dosage from the dosage tracking device;   if there is agreement between the delivered dosage from the injector and the desired dosage from the dosage tracking device, then indicating the dosage; and   if there is not agreement between the delivered dosage from the injector and the second dosage from the dosage tracking device, then adjusting output of the dosage tracking device to the delivered dosage from the injector.   
     
     
         14 . The method of  claim 13 , further comprising a verification button mounted on the housing and configured for identifying a user action indicative of injection; wherein the verification button is enabled and disabled by the processor. 
     
     
         15 . The method of  claim 13 , wherein the one or more sensors includes an active vibration sensor to measure activity of an injector included in the pen injector. 
     
     
         16 . The method of  claim 15 , further comprising: detecting a pulse using the active vibration sensor; and when the pulse lasts more than a threshold time pulse width then adjusting of the dosage tracking device in a first manner, and when the pulse lasts less than a threshold time pulse width then adjusting of the dosage tracking device in a second manner. 
     
     
         17 . A method for calibrating a dosage tracking device releasably connected to a pen injector, the method comprising:
 measuring a delivered dosage from the pen injector using one or more sensors on the dosage tracking device while the dosage tracking device releasably connected to the pen injector;   reading a selected dosage using at least one sensor on the dosage tracking device releasably connected to the pen injector;   comparing the delivered dosage from the injector and the selected dosage from the dosage tracking device;   if there is agreement between the delivered dosage from the injector and the selected dosage from the dosage tracking device, then indicating the dosage; and   if there is not agreement between the delivered dosage from the injector and the selected dosage from the dosage tracking device, then adjusting output of the dosage tracking device to the delivered dosage from the injector.   
     
     
         18 . The method of  claim 17 , further comprising a verification button mounted on the housing and configured for identifying a user action indicative of injection; wherein the verification button is enabled and disabled by the processor. 
     
     
         19 . The method of  claim 17 , wherein the one or more sensors includes an active vibration sensor to measure activity of an injector included in the pen injector. 
     
     
         20 . The method of  claim 19 , further comprising: detecting a pulse using the active vibration sensor; and when the pulse lasts more than a threshold time pulse width then adjusting of the dosage tracking device in a first manner, and when the pulse lasts less than a threshold time pulse width then adjusting of the dosage tracking device in a second manner.